Παραπομπή APA

Hrbacek, k. (1984). Introduction to set theory. Marcel Dekker.

Παραπομπή Chicago Style

Hrbacek, karel. Introduction to Set Theory. New York: Marcel Dekker, 1984.

Παραπομπή MLA

Hrbacek, karel. Introduction to Set Theory. Marcel Dekker, 1984.